if anyone is of Eurpean descent, there is almost a 100% chance that their ancestors at some point were Catholic.
some of still believe the faith of our fathers.
I'd heard scandalous rumors about them Templars being Catholic, but I just wasn't sure, lol.
Seriously though, it seems that there is a misconception afoot here. The Reformation was an attempt at righting the then-wrongs of the Catholic Church, almost entirely a European event. It did not and does not represent a wholesale rejection of all things taught by that church, just those things that do not find scriptural support and especially that which runs counter to it. It was an attempt to return to first principals, hence the obvious reverence with which certain early "church fathers" are held.
Shifting focus to England, Henry Tudor maintained he was Catholic until the day he died. The pendulum swung back and forth, with the "ins" persecuting the "outs" by turn as they came back into favor and then back out once again, for over a century. No one's hands could be said to be clean.
I've actually found it's more likely for the shoe to be on the other foot, as far as ignorance of church history in the British Isles, England in particular.